I took a look at it on a video, and I don't think it's worth purchasing. Personally, I like using a computer and I can't think of any other way to design themes. I usually have multiple folders I organize my icons in and all the folders are open at the same time. I think multitasking between programs is easier on a computer. Also, I don't know about its capability with shapes. I usually use rounded rectangles, circles, and other shapes when I'm designing. It's a lot easier for me to adjust these. Another thing is saving the images. Can you save as a .psd? It's much easier to be able to save as a .psd so you can open the whole file with layers later. I think Photoshop Touch is mainly for photo editing. If you want a designing program I recommend GIMP. You can do a lot of stuff in GIMP that you can in Photoshop, it just takes longer.